This study includes data on dynamic state policy innovativeness scores
from the SPID data, version 1.2. 

Compiled on June 21, 2021 by Scott Lacombe (slacombe@smith.edu) and 
Frederick J. Boehmke (frederick-boehmke@uiowa.edu).

For information on the SPID source data from which these are derived, see
its study page at: https://doi.org/10.7910/DVN/CVYSR7.


INCLUDED:  

1 Stata data sets: 
 
  SPID_v1.2_dynamic.dta 	Dynamic state policy innovativness rate scores.
  
1 Stata do-file: 
 
  SPID_v1.2_dynamic.do 		Commands to generate dynamic rate scores.
  
1 README file: 
  
  SPID_v1.2_dynamic-README.txt	Describes the included data and files.  

  
VARIABLES:

statenam        str14   %14s    State Name
year            int     %9.0g   Year
inn_rate_bi     float   %9.0g   Dynamic Innovation Rate - biennial
inn_rate_sm     double  %10.0g  Dynamic Innovation Rate - smoothed
inn_rate_sm_se  double  %10.0g  Dynamic Innovation Rate - smoothed (standard error)

  
NOTES:

1. The dynamic rate scores represent the number of policies adopted by
each state divided by the number of state-year adoption opportunities in
a two year window. Adoption opportunities begin in the year the policy
was first adopted by any state and end in the year of adoption (if adopted) 
or the year of the last observed adoption by any state. 

2. The smoothed scores use a local polynomial regression on the binary 
adoption data  to smooth the rate score over a three year period (using 
the default stpolinn bandwidth of 1.5).

3. These scores only use policies first adopted in 1912 or later. Scores
for Alaska and Hawaii begin in 1958 (adoption recorded in the data prior
to that are ignored). 

4. These scores were calculated using the Stata program stpolinn.ado. For
more information visit http://fredboehmke.net/methods.html. To install in 
Stata, type the following at the command line and follow the options:

	net from http://myweb.uiowa.edu/fboehmke/stata/stpolinn

5. These scores were created from the SPID data using the commands documented 
in the included Stata do-file. They were run in Stata Version 14 for Windows. 
You will need to install stpolinn to run the file - see #3 above.
 

RELATED WORK:

Frederick J. Boehmke; Mark Brockway; Bruce Desmarais; Jeffrey J. Harden; Scott 
LaCombe; Fridolin Linder; Hanna Wallach, 2018, "State Policy Innovation and 
Diffusion (SPID) Database v1.2", https://doi.org/10.7910/DVN/CVYSR7, 
Harvard Dataverse, V4, UNF:6:thxLqNh8In+OoHGUN4vVew== .

Boehmke, Frederick J.; Mark Brockway; Bruce A. Desmarais; Jeffrey J. Harden; 
Scott LaCombe; Fridolin Linder; and Hanna Wallach. 2020. “SPID: A New 
Database for Inferring Public Policy Innovativeness and Diffusion Networks.” 
Policy Studies Journal 48(2): 517-545. doi: 10.1111/psj.12357.

Boehmke, Frederick J. and Paul Skinner. 2012. "State Policy Innovativeness 
Revisited." State Politics and Policy Quarterly 12 (3): 304-330.

